// 云函数入口文件
const cloud = require('wx-server-sdk')
cloud.init({
  env: cloud.DYNAMIC_CURRENT_ENV
})
const db = cloud.database()
const _ = db.command

// 云函数入口函数
exports.main = async(event, context) => {
  try {
    return await db.collection('gottickets').where({
        concertid: event.concertid
      })
      .update({
        data: {
          users: _.push(event.userid)
        },
      })
  } catch (e) {
    console.error(e)
  }
}